Automatic regulating device for steam-heaters.



No. 696,739. Patented r; 1,1902.

E. B. ALLEN & w. a. SALMON 7 AUTOMATIC BEGULATING DEVICE FOR STEAM HEATERS.

(Applicatiol; filed Feb. 11, 1901) g-No Modal. Zheets-S t, L

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Q 1 Y I w R [/VVE/VTORS .Aflomeyo 'No. 696,789. Patented Apr. l, I902.

E. B. ALLEN & w. B. SALMON. AUTOMATIC BEGU LATING DEVICE FOR STEAM HEATERS.

(Application filed Feb. 11, 1961. (No Model.) 7 2 sheets-sheet 2.

Aflomejlo u: NORRIS PETERS co, Pxumuma WASN nu'ron D c UNITED STATES EDWARD ALLEN AND \VILLIAM BARTLY SALMON, OF FLEMINGTON, NElV JERSEY, ASSIGNORS TO THE ALLEN AND VAN NEST COMPANY, OF FLEMINGTON, NEW JERSEY, AND NElV YORK, N. Y.

AUTOMATIC REGULATING Device FOR STEAM-HEATERS.

SPEGIFIGATION forming part of Letters Patent No. 696,789, dated April 1, 1902.

Application filed February 11, 1901. Serial No. 46,889. (No model.)

To all whom it may concern-.-

Be itknown that we, EDWARD B.ALLEN and WILLIAM BARTLY SALMON, citizens of the United States, residing at Flemington, in the county of Hunterdon and State of New Jersey, have invented certain new and useful Improvements in Automatic Regulating Devices for Steam-Heaters; and we do hereby declare the following to be a full, clear, and exact description of the invention,sucl1 as will enable others skilled in the art to which it appertains to make and use the same.

Our invention is an improvementin automatic regulating devices for steam heating apparatus; and it consists in the novel features hereinafter described, reference being had to the accompanying drawings, which illustrate one form in which we have contemplated embodying ourinvention, and said invention is fully disclosed in the following description and claims.

Referring to the said drawings, Figure 1 represents a side view of a steam-heater,showing our improved regulating apparatus applied thereto. Fig. 2 is a similar view showing the parts in different positions. Fig. 3 is a top plan view of the heater and regulating apparatus. Figs. 4, 5, and 6 are side views of the upper part ofthe heater, showing our apparatus in different positions. Fig. 7 is a partial rear view of'the heater.

The object of our invention is to provide a cheap and simple apparatus which will give a wide range of control of the heater andwhich will be operated by the steam-pressure generated in the heater. To this end our apparatus is arranged to control the draft damper or door, the smoke-pipe damper, and the check-draft and is so constructed and arranged that it will first close the draft-door without altering the positions of the other parts, then will close the flue or smoke-pipe damper, and th en on further movement will open the check-draft. \Vith this wide range of control the heater will control itself, and by means of an adjustable weight the apparatus can be left entirely without care for long periods and will automatically control the fire, so as to maintain a predetermined steam-pressure.

In the drawings, A represents a steamheater, which may be of any usual or preferred form, in which (t represents the lower draft-damper, consisting in this instance of a door hinged along its upper edge. a represents the usual flue or smoke-pipe damper provided with a reduced central aperture. and represent a check draft door normally closing an aperture in the smoke-pipe in rear of the tlue-damper for admitting air directly into the flue, and thus depriving the fire of even the small draft afforded by the reduced aperture a? in the flue-damper a.

The pivotal shaft or of the flue-damper a is provided with an operating-arm a, hereinafter referred to, and a shorter arm a which is adapted to engage an arm or bracket a, connected with the check-draft door a when the flue-dam per has been moved into position to substantially close the smoke-pipe A, so that when the damper a has been closed any further movement of the arm a will cause the arm a to engage the arm a and raise and open the check-draft door a A represents a steam-outlet pipe or main connected with the steam-generating chamber of the heater, and A represents a steampipe also connected with the generatingchamber and provided with a diaphragm-governor A, having a piston or actuating-rod A The construction of these diaphragm-governors is so well known as to need no particular description, it being understood that the pressure of steam in the generating chamber causes an upward pressure on the diaphragm, and thus raises the rod or piston A WVe preferably provide a collar to clamp around the main A and carry the levers forming part of my apparatus. This collar consists of two parts B 13, formed to fit around the pipe A and connected by boltsand nuts. One of the parts B is provided witha projection or stud b, on which is pivotally mounted a lever 0, having one end extending forward, so as to clear the front of the heater, and its other end provided with a counterbalanceweight D, adapted to be moved along the lever to vary the pressure of steam required to operate the device.

The governor A is provided with a liftingdamper.

-ing the rear end of lever C.

lever A, pivoted at one side of the same, engaging the upper end of the piston or rod A and having its free end extending beneath and in contact with the rear end of lever C. The front end of lever C is connected by a chain or other flexible connection E with the draft-doora, said chain being so arranged that when there is no pressure of steam in the generating-chamber the weight D will hold the draft-door a open, as shown in Fig. 1.

F represents a second lever, pivoted between its ends to one of the parts B of the clamping-collar, as shown, and having. its rear end connected by achain f or other flexible connection with the' arm a of the fluedamper, the said chain .being so arranged that when the damper a is open (in which position it willbe normally heldloy the weight of the arm a) the said chain will be slack until after the damper ct has been closed by the movement of lever C. The forward end of lever F is pivotally connected to the forward end of lever O bya pin (or bolt) f and slot connection, permitting a small amount of play to prevent binding the parts, and lever F is preferably provided with a series of aperturesf, in which the pin or bolt f maybe inserted, so as to change the leverage thereof to secure the desired movement of the rear end of the lever and to regulate the extent to which the check-draft may be opened. The lever O is provided with a slot 0 to engage the 'pin or boltf The operation of the parts will be as follows: Supposing the parts to be in the position indicated in Figs. 1 and 4, the draft-damper a being open, the flue-damper a fully opened, and the check-draft closed, a fire is started in the heating apparatus, and the weight D is moved to the desired position on the lever C to maintain a given steam-pressure in the heater. As soon as this degree of pressure has been reached in the heater the diaphragm-governor A will cause its rod A to rise, thereby partially elevating the lever A and rais- This will cause the'depression of the forward end of lever C and will first close the d raft-door a and at the same time move the lever F so as to take up the slack of chainf, connected with the flue- This position of the parts is indicated in Fig. 5. If the closing of draft-door a does not sufficiently check the fire and the pressure rises inthe heater, the further upward movement of the rear end of lever C will cause lever F to lift arm a and partially or wholly close the flue-damper a and bring arm a in position to engage arm a as shown in Fig. 6. Should the pressure yet increase, the further upward movement of lever 0 will cause lever F to raise arm a still farther, and the arm a will lift arm a", and thereby .open the check draft door m as shown in Fig. 2. As the pressure falls the cheek-draft will first be closed, then the fluedamper will be opened, and lastly the draftdoor will be opened. By this means there are three separate devices for controlling the fire, all independently under the control of the diaphragm-governor and arranged to be operated in a predetermined order under all circumstances, thus insuring a very regular and even pressure and temperature. I

What We claim,and desire to secure by Letters Patent, is

1. The combination with a steam-generator provided with a draft-damper, a flue-damper and a check-draft, of regulating devices including a clamping-collar adapted to be secured to a pipe connected with the generator and provided with two oppositely-extending arms, an operating-lever pivoted to one of said arms, a connection providing for lost motion extending from one end of said lever to the draft-damper, a governor actuated by steam-pressure operatively connected with said lever, a second lever pivoted to the other arm of said collar having one end movably connected to said first lever and the other end connected to the fine-damper, said connections providing for lost motion and connections' also providing for lost motion between said second lever and the check-draft, substantially as described.

2. The combination withasteam-generator provided with a draft-damper, a pivoted fluedamper and a check draft damper in the smoke-pipe adjacent to the flue-damper, of regulating devices including an operating-lever, a steam pressure governor connected ICO therewith, a connection providing for lost motion between said lever and the drat' t-dam per,

a second pivoted lever having one end operatively connected with the first lever, an 0pcrating-arm on the pivot of the flue-damper,

a connection providing for lost motion extending from said arm to the free end of. said second lever, a second arm on the pivot of the flue-damper and a part connected with the check-draft damper normally out of en- I10 gagement with said second arm but adapted to be engaged thereby when the flue-damper is closed, to open the check-draft damper, substantially as described.

In testimony whereof we affix our sigua- I15 tures in the presence of two witnesses.

EDWARD B. ALLEN. WILLIAM BARTLY SALMON.

Witnesses:

GEO. F. HANSON, PAUL 0. QUEEN. 

